112 years old now in 2024 - what year born?

Today, 15 October 2024 if a person is 112 years old now, what year was he born? See below:

If 112 years old, year of birth is:
1911 or 1912*

*It depends on whether he was born before or after 1 January 1912.

If now 112 years and his year of birth 1911 if he was born after 15 October 1911 until 31 december 1911 inclusively, and his year of birth is 1912 if he was born from 1 January 1912 to 15 October 1912.

Other examples:

If now 4 years, year of birth 2019 or 2020
If now 16 years, year of birth 2007 or 2008
If now 25 years, year of birth 1998 or 1999
If now 59 years, year of birth 1964 or 1965

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